Request reviews from apps-infra-tooling on Dependabot PRs (#725)

Author: mokagio

.github/dependabot.yml

@@ -7,4 +7,6 @@ updates:
     groups:
       ruby-minor-and-patch:
         update-types: [minor, patch]
+    reviewers:
+      - "wordpress-mobile/apps-infra-tooling"
     open-pull-requests-limit: 5